Calciojohillerite

Availability

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Size

3.5 x 3.5 x 2 cm - Miniature 

Formula

NaCaMg₃(AsO₄)₃ (RRUFF)

Locality

Tolbachik Volcano, Kamchatka, Russia

Tagged

arsenate

Calciojohillerite is a greenish to yellowish, blue to almost colorless well-shaped, terminated crystals (about 1 mm) combined in clusters / crusts on basalt scoria altered by fumarolic gas. The specimen is very rich. It is one of the few study specimens from Igor Pekov's collection used to characterize the new mineral. 

A more detailed locality is: Arsenatnaya fumarole, Second scoria cone of the Northern Breakthrough of the Great Tolbachik Fissure Eruption, Tolbachik volcano, Kamchatka, Russia. 

XRD Confirmed, EDS Confirmed, Type & Only Locality, Author's Material